A cliched list of reasons for want to be a nurse. Not too promising . . .
To positively impact peoples lives while achieving a lifelong dream.
The same error Simone pointed out. A stylistic choice that doesn't work. Turn this and the others into full sentences.
I have been hospitalized three times in my life, and I know exactly how it feels to be all alone in a hospital room.
This is better. Personal and more specific.
o be able to speak to them in their own native language, and help them feel at ease and comfortable, would be a reward and a privilege. "If you talk to a man in a language he understands, that goes to his head. If you talk to him in his language, that goes to his heart." Nelson Mandela.
Actually, your first body paragraph is turning out much better than the introduction would have led me to expect. Good quote. Don't just drop Nelson Mandela in there as its own sentence, though.
I believe, being a nurse
I believe it provides a vast opportunity
Stop with the "I believe." I know you believe these things. Otherwise, why would you be writing them?
First, working as the Office Manager for the Mother's Milk Bank in Austin Texas, I screened all donors as well as helped pasteurize donor human milk to help premature and sick babies in the Neonatal Intensive Care Units throughout the United States.
More good specific detail.
Your essay is fairly strong, then, overall. I'd cut the intro, and fix up the topic sentences as Simone suggested, though.